Allow puppet to set COURSE_LISTINGS

Feature/victor/create test courses

add gitreload to lms-migration code

Initial pass at script to create links to test dirs.

Feature/victor/per course progress

Minor change in extract_choices in choicegroup to allow for html in choice text

Feature/victor/policy dirs

* reorder index fields

* Update all uses.

* Save errors for courses that failed to load in modulestore
* global staff can see course errors on their dashboard
* put policy loading errors into the error trackers
* add has_access(user, 'global', 'staff'), which is equiv to user.is_staff for now

* with backcompat location /grading_policy.json

* still backcompat with old mode

Remove non-functioning News tab. Enable Instructor tab from Discussion page

Sequential modx/goto_position hits correct multicourse URL

Berkeley Forum Merge

Allowing filesubmissions to specify which files are allowed and require that certain files are present.

New wiki update